Poggendorff immediately put himself in communication with the publisher, Barth of Leipzig, with the result that he was installed as editor of a scientific journal, Annalen der Physik and Cheinie, which was to be a continuation of Gilberts Annalen on a somewhat extended plan.
In 1850 James Richardson, accompanied by Heinrich Barth and Adolf Overweg, reached the lake, also via Tripoli, and Overweg was the first European to navigate its waters (1851).
Stralsund entertains passengerboat communications with Barth, Stettin, Rostock and Lubeck as well as with various small ports on the isle of Riigen.
Barth, however, concluded that the present town does not date earlier than the second half of the 1 6th century, and that before the rise of the Fula power (c. 1800) scarcely any great Arab merchant ever visited Kano.
It was visited by Hugh Clapperton, an English officer, in 1824, and in it Barth lived some time in 1851 and again in 1854.